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3 years ago

How can atoms make up all of the substances around you

1 answer:

6 0

How can atoms make up all of the substances around you? Because there are a lot of atoms in the substances. ... If atoms are made of smaller parts such as electrons,why are atoms considered the basic unit of matter? It is the smallest unit that has the chemical property's of an element.

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What total distance will a sound wave travel in air in 3.00 seconds at stp?

dimaraw [331]

At stp conditions ( $T=0^{\circ}C$ ), the speed of sound is
$v=331.2 m/s$
The sound wave moves by uniform motion, so we can use the basic relationship between space, time and velocity:
$S=vt$
where S is the distance covered by the sound wave in a time t. In our problem, t=3.00 s, therefore the distance covered by the sound wave is
$S=vt=(331.2 m/s)(3.00 s)=993.6 m$

4 0

3 years ago

A goose with a mass of 2.0 kg strikes a commercial airliner with a mass of 160,000 kg head-on. Before the collision, the goose w

Goryan [66]

Answer:

The change in momentum of the goose during this interaction is 33.334 m/s

Explanation:

Given;

mass of goose, m₁ = 2.0 kg

mass of commercial airliner, m₂ = 160,000 kg

initial velocity of the bird, u₁ = 60 km/hr = 16.667 m/s

initial velocity of the airliner, u₂ = 870 km/hr = 241.667 m/s

Change in momentum is given as;

ΔP = mv - mu

where;

u is the initial velocity of the bird

v is the final velocity of the bird

Apply the principle of conservation of linear momentum;

Total momentum before collision = Total momentum after collision

m₁u₁ + m₂u₂ = v(m₁ + m₂)

where;

v is the final velocity of bird and airliner after collision;

(2 x 16.667) + (160,000 x 241.667) = v (2 + 160,000)

38,666,753.334 = 160,002v

v = 38,666,753.334 / 160,002

v = 241.664 m/s

Thus, the final velocity of the bird is negligible compared to final velocity of the airliner.

ΔP = mv - mu

ΔP = m(v - u)

ΔP = 2(0 - 16.667)

ΔP = -33.334 m/s

The negative sign implies a deceleration of the bird after the impact.

Therefore, the change in momentum of the goose during this interaction is 33.334 m/s

4 0

3 years ago

Corn plants and milkweed plants grow in the same area. Over several years, the milkweed plants have taken over the field and the

erma4kov [3.2K]

Weeds are very important agronomically because they reduce the yield of crops in three ways: by competing with the crop for water, light and nutrients, by interfering with crop harvest, and by contaminating harvested products with weed seeds and toxins. Weeds can reduce yield up to 50% and are responsible for millions of dollars in crop losses each year.

It’s biotic factor would be competition as Competition can be defined as an interaction between organisms or species, in which the fitness of one is lowered by the presence of another.

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3 years ago

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How has technology influenced theories over time?

Contact [7]

Better technology is helping us because we can see more stuff like the microscope we able to make assumptions based on what we saw.

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3 years ago

Five race cars speed toward the finish line at the Jasper County Speedway. The table lists each car’s speed in meters/second. If

Anarel [89]

I think the answer would be Car C.

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3 years ago

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